Solving heat equation with PETSc *)

• Initialization of PETSc

• Initialization of matrix A

• Initialization of the boundary condition b

  • Data: Vector u := predefined exact solution Vector b := boundary condition (RHS) Vector x := approximate solution computed
  • Initialization of b, u: b, u – see previous slides [ heat, u(x,y)=x ]or with –random_exact_sol: u = random values, b := Au

• Solving Ax=b

• Checking the solution error_norm = || x – u ||2

*) based on petsc/src/sles/examples/tutorials/ex2.c

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